The price of Nama differs according to the country it is sold in. It also differs according to which systems you buy — Nama provides financial, manufacturing, real estate, service and other systems — and according to how many legal entities you run, how many concurrent users you need, and how many point-of-sale machines you operate, since a register is licensed per machine rather than as a user.
Branches are not a factor. A company with one branch and a company with twelve pay the same for the software, and linking branches so that balances and quantities are visible across all of them does not change the price either.
Contact your nearest Nama office for a quote against your own scope, or read what the price includes and what moves it.